如何找到（在javascript中）当前的“滚动”按钮。移动safari / iphone中的偏移量 [英] How to find (in javascript) the current "scroll" offset in mobile safari / iphone

问题描述

我想知道用户在iphone上的移动版游戏中在视口内滚动了多远的x / y偏移量。

I'd like to know the x/y offset of the how far the user has "scrolled" within the viewport in mobile safari on the iphone.

Put换句话说，如果我（通过javascript）重新加载当前页面，我想找到我需要传递给window.scrollTo（...）的值，以便重新定位当前的文档/视口。

Put another way, if I (through javascript) reloaded the current page, I'd like to find the values I'd need to pass into window.scrollTo(...) in order to reposition the document/viewport as it is currently.

window.pageXOffset总是报告0

window.pageXOffset always reports 0

jquery的$（'body'）。scrollTop（）总是报告0

jquery's $('body').scrollTop() always reports 0

事件有一个pageX，但如果您的手势是轻弹页面，这将不会解释您松开手指后发生的页面滚动/下。也就是说，当手指离开屏幕时它会给我一个点，但这并不总是与页面在完成滚动后的位置相匹配。

events have a pageX, but this won't account for the scrolling of the page that happens after you release your finger if your gesture was to "flick" the page up/down. Namely, it'll give me a point when the finger leaves the screen, but that doesn't always match where the page will be after it's finished scrolling.

任何指针？

推荐答案

window.pageYOffset 应该为您提供当前的滚动偏移量。如果你需要它还有 window.pageXOffset 。

window.pageYOffset should give you the current scroll offset. There's window.pageXOffset if you need it too.

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